Holly stresses out when her judgmental younger sister arrives for a visit on an all-new episode of "Mystery Girls," airing on Wednesday, July 30th at 8:30 p.m. ET/PT.

In "Sister Issues," Holly feels inferior to her younger sister Stephanie (Jamie Denbo), a heart surgeon, and is determined to show her how well she's doing. Holly thinks she found the perfect way to impress Stephanie when the Mystery Girls are hired to find a missing young heiress. With some help from a selfie, they track her last location to a biker bar. Once they arrive and begin snooping around, Charlie discovers that Nick actually faked the entire case in order to cheer Holly up. The girls decide to keep up the charade once Stephanie arrives, but when they push around the wrong biker, things go from bad to worse.

Part of the Disney/ABC Television Group, ABC Family is distributed in over 97 million homes. ABC Family features programming reflecting today's families, entertaining and connecting with adults through relatable programming about today's relationships - told with a mix of diversity, passion, humor and heart. ABC Family's programming is a combination of network-defining original series and original movies, quality acquired series and blockbuster theatricals. For 2014, ABC Family has launched the "WATCH ABC Family" authenticated service which allows viewers with participating TV subscription services access to 24/7 live viewing of the network, as well as continued on demand access to such popular series at home and on the go via a wide array of devices. ABC Family is also the destination for annual Holiday events with "13 Nights of Halloween" and "25 Days of Christmas." ABC Family. A New Kind of Family.